Jurgen Klopp admits Liverpool's transfer business is still not complete as Reds target defender

FC Koln defender Jonas Hector is on Liverpool's radar.

Jurgen Klopp has admitted that Liverpool could bring in a defender in the summer transfer window after several injury setbacks, even before the start of the 2016/17 season. The Reds played their last pre-season fixture in America as they suffered a 2-1 defeat at the hands of AS Roma.

During the clash, Moreno and Divock Origi picked up injuries. The Spaniard has become the latest defender to join Mamadou Sakho, Joe Gomez and Lucas Leiva in Anfield's treatment room. The France international and Gomes are set to miss their side's opening league tie against Arsenal at the Emirates on 14 August.

The Merseyside club have allowed Martin Skrtel and Kolo Toure to leave Anfield in the summer transfer window. Lucas can also play in the central defending position and the situation has left Klopp with lack of options while selecting his back four.

"Is the activity all over? I have no idea. I don't think so. We will see what happens. What you saw (in St Louis against Roma) was an example of how you can't defend; leaving spaces so big you could have cut grass in between," Klopp explained, as quoted by the Daily Mail.

"Their strikers did okay but we were too wide, too deep and too far from each other so each pass they played was a chance.

"Gomez, Sakho and Lucas are all injured so of course we haven't got enough centre backs at the moment. There have been too many games with not enough centre backs," Liverpool manager added.

Jurgen Klopp could bring in one more defender in the summer transfer windowGetty Images

Klopp had initially decided against making further defensive signings after Liverpool were left frustrated in their efforts to sign Leicester City full-back Ben Chilwell. However, latest injuries forced the former Borussia Dortmund boss to consider a move for FC Koln defender Jonas Hector.

The report from the Daily Mail claims that the German international is valued at around £20m ($26.6m). He was part of the national side at Euro 2016, where they lost to France in the semi-final. Should Liverpool manage to land the Bundesliga defender, he will challenge Moreno for a place in the starting lineup.